THE ORCHID REVIEW. 299 
crispum. and O. dasytyle, among the well-known and common species; while 
among the rarer forms are O. curtum, O. pectorale, O. Gardneri, O. elegan- 
tissimum, and O. caloglossum. The four last named, though described as. 
species, are all, I believe, of hybrid origin. 
We may now consider these hybrids individually, grouping them under 
the joint names of the parent species, as in the case of Odontoglossum. 
OncipIumM x MARSHALLIANO-ForBEsII.—As long ago as 1840 a plant 
was described by Lindley under the name of O. pectorale, which I believe is 
a natural hybrid derived from O. Forbesii and O. Marshallianum, and it is 
a somewhat curious fact that the last-named species was not known until 
a quarter of a century afterwards. Three other forms are all, I believe, 
derived from the same parentage, namely, O. caloglossum, O. Mantinii, and 
QO. Larkinianum. 
Oncidium x pectorale appeared in the collection of James Wentworth 
Buller, of Exeter, in April, 1840. It was imported from Rio de Janeiro, 
with O. Forbesii, which it was said to resemble in habit. It has yellow 
flowers, the sepals barred with reddish brown, and the petals with a large 
similarly-coloured disc and some small marginal dots. The lip is yellow, 
and the crest consists of numerous scattered rounded tubercles. The latter 
organ was compared with an old-fashioned ladies’ stomacher, studded with 
little knots, in allusion to which the name was given. The column-wings 
are yellow, spotted with red. ; 
Oncidium x caloglossum appeared with Mr. W. Bull, of Chelsea, in 
1885, and was described by Reichenbach, who compared it with O. x 
pectorale, of which I believe it is only a variety. It chiefly differs in 
having some brown blotches in front of the lip, probably derived from O. 
Forbesii. A very similar form has recently appeared with Messrs. | ge 
Williams and Son, of Upper Holloway, which is said to have been imported 
with O. concolor, a native of the same region, but which has evidently no 
share in its parentage. 
Oncidium x Mantinii appeared in 1887, in the horticultural establish- 
ment of M. Truffaut, at Versailles, whence it passed into the collection of 
M. Georges Mantin, of Olivet, near Orleans. It was acquired from M. 
Binot, an Orchid collector at Petropolis, in Brazil, it is believed in an im- 
Portation of O. crispum. M. Godefroy Lebeuf, who described it, thought it 
might be a natural hybrid between O. Marshallianum and O. Gardneri, or 
Possibly ©. sarcodes. The former is evident enough, but the other parent 
Was evidently ©. Forbesii, as the shape and colour of the sepals and petals, 
the presence of a number of scattered red spots on the lip, the shape of the 
crest, and the spotted column-wings all clearly indicate. 
Oncidium x Larkinianum appeared in the collection of J. Larkin, Esq., 
- Aldenham, near Watford, and is unmistakably derived from O. Marshal- 
lianum and O. Forbesii, the features of both parents being unusually well 
